Box and method of making same.



A. R. ROBSON.

BOX AND METHOD OF MAKING SAME.

APPLICATION FILED DEC. 16. 1915.

TNESSES:

INVENTOR wm w A; ,4 TTOR/VEY Patented Sept. 24, 1918. v

ALLAN ROY ROBSON, or PHILADELPHIA, PENNSYLVANIA, AssiGNoaTo mi s & COM-- PAINY, 0F PHILADELPHIA, PENNSYLVANIA, A CORPORATI N OF PENNSYLVANIA.

To all whom it may concern:

Be it known that I, ALLAN Roy ROBSON,

a citizen of the United States, residin at Philadelphia, in'thecount'y of Philadelp' ia, in the State of Pennsylvania, have invented new and usefulflmprovements in Boxesand Methods of Ma'kin Same, of which the following is a speci cation,

This i 'vention relates to boxes or cartons of cardboard, strawboard or other material and has for its object to provide such a box or carton with a, closure whic'h'will prevent the contents from leaking out, as well as protecting the contents from the atmosphere 1s and from, vermin. v

In the. card-board boxes heretofore used for packing pulverized material, as,for 'example, soap powder, sugar, flour, etc., great difficulty vhas been experienced in preventing from leaking at th'ecorners of" the powder the box. So difficult has 1t been to make a paper box which will not leak at the corners that many manufacturers have been forced to line the entire box with a lining which is in effect a paper bag in order to prevent the powder from leaking out at the corners. This is expensive and unsatisfactory, as the paper lining tends'to leak at the corners just as the box does.

I have discovered that a box which will not'leak at the corners can be made by attaching a sheet of paper to the inner side of the flaps of the box while these'are in open position.

In order that my invention may be clearly I understood, I will describe the embodiment of it shown in the accompanying drawings, in which- Figure l is an end view of the box with the flaps in open position andthe closure-sheet applied to them.

Fig. 2 is a sectional elevation taken on the line 22 of Fig. 1 and showing the upper end flaps and closure-sheet in the position shown in Fig. 1 and the lower end flaps and closure-sheet in closed position.

Fig. 3 is an end view of the box showing the position of the closure-sheet after the narrow flaps have been folded in.

Fig. 4 is an end view of the box showing the position of the closure-sheet after the two narrow flaps and one broad flap have been folded in.

Fig. 5 is a fragmentary sectional elevation taken 011 the line 5-5 of Fig. 3 showing the v Specification of Letters Patent.

narrow fiaps and'the closure-sheet in the same position as shown an Fig. 3.-

FlguG-IS a fragmentary sectional elevation flaps and closure-sheet in the same position as-shown in' Fig. 4;. I

" taken'on the line-6 6 of Fig. 4: showing the i Fig. '7 is a perspective view of the box I with thetop flaps open and the closure-sheet 'appli'edto them,'as in Fig. -1. 1

' I first construct a box "of card-board,

straw-board or'other material, pasted to-&

gether along one side. Each of thesides of the box is extended in each-direction to form the end flaps, 2,3. I then open the end flaps 2, 3, atone end 'of the box, so'that 'theyvextend outwardly at right-angles to the sides of the box, as illustrated in "Figs. .1, 2, 7.

effected by meansof a sheetof paper or other material,- 4, larger than the transverse crosssection of the box. While the flapsiare in the POSliZlOIl shown in Figs 1, 2, 7, I attach The" tight closure of this end ofthe box is a then folded. inwardly, the edges of the sheet 4' which are attached to these flapsbeing folded'in with them, so that the sheet 4 as sumes the position shown in Fig. 3.. The

broad end flaps 3 are then folded in successively (Fig. 4). By this means a closure is formed at one end of the box through which no powder can sift. The box is then filled andthe other end closed by another closure-sheet ,4 in the way described.

Various different means of attaching the closure-sheet to the flaps and of attaching the flaps to each other so that they will stay folded, may be used, the means varying according to the material of which the box and the closure-sheet are made. If the box and sheet are of a material to which an adhesive, such as glue, paste or the like, will adhere, the attaching of the closure-sheet may be effected as follows: After the flaps have been extended outward at right-angles to the sides of the box, adhesive is applied to the inner surface of all the flaps. The closure-sheet is then placed in the position shown in Figs. 1. 2 and 7 and its marginal portions are attached to the flaps by the adhesive upon them. The flaps are then folded inwardly in the way described and the adhe powder can si sive on the narrow flaps adheres to the central portion of the closure-sheet, while the adhesive on the wide flaps attaches them to the narrow flaps and to each other.

If the carton or the closure-sheet be impregnated with wax to render it moistureresisting, the attachment of, the closuresheet to the flaps may be effected by heat and pressure in the way in which a seal of wax paper is customarily effected.

. \Vhile I have described the use of the closure-sheet at both ends of the box, it can, of course, if preferred, be used at one end only. It should be understood also that my invention is not limited to the rectangular carton shown in the drawings, but may be embodied in cartons of other shapes. Besides providing a box through which no t, my invention results in a box which is substantially moisture-proof, particularly if the box and closure-sheet be made of-moisture-resisting material. The box which I have invented also effectively protects the contents from vermin.

What I claim is 1. A box having end flaps, and a closure sheet at the inner surfaces of said end flaps andextending across {the space between edges of adjacent flaps when in unfolded position.

2. A box having end flaps, and a closure sheet attached to the inner surfaces of said end flaps and extending across the space between edges of adjacent flaps when in unfolded position.

v 3. A box having end flaps, and a closure sheet extending entirely across the end of the box and onto the inner surfaces of the flaps, and across the space between edges of adjacent flaps when in unfolded position.

4. A box havingend flaps, and a closure sheet at the inner surfaces of said end flaps, said closure sheet having a corner extension overlapping two adjacent flaps on their inner faces at a corner of the box, when the flaps are in folded position.

5. A box having end flaps, and a closure sheet attached tojthe inner surfaces of'said end flaps, said closure sheet having a corner extension overlapping two adjacent flaps on their inner faces, at a corner of the-box,

ALLAN ROY ROBSON. 

